"Moving up the food chain" would be very difficult to do, in terms of absolute fidelity, with a well used Taboo/SE84CS or any other Decware amp.More like the end users requirements for power delivery has changed, or "equipment-lust" has taken hold.Any one of Decware's earlier offerings can be stellar when the appropriate synergy is achieved.

I own (and LOVE) a CSP2 that I had built in the original chassis (and without a headphone jack), not the then spanking new white chassis, to match the SE34 Monoblocks I was using it with at the time. So a CSP2 COULD be int he CSP chassis. . . or that could be a CSP.